Battlestar Galactica use to, as a general rule, spoil the episode before showing the episode during the intro. Sitting down to watch the show and *pow* what you're going to see in this episode you've already decided to watch!
Well, Sarah Connor Chronicles isn't that annoying but the intro was written by a MORON!
In the future, my son will lead mankind in a war against Skynet, a computer system programed to destroy the world. It has sent machines back through time, some to kill him, one to protect him. Today we fight to stop Skynet from ever being created. To change our future. To change his fate. The war to save mankind, begins now!
No. Skynet was not programmed to destroy the world. Skynet isn't trying to destroy the world... it's trying to kill all humans. Skynet was not programmed to destroy all humans. It became conscious and decided to do that! The former (destroy world) would be a stupid thing for a robot to do, and, being human, I reserve judgment on the latter (kill all humans). Skynet never sent the "one [robot] to protect him". -- Clearly that robot is reprogrammed and being used to protect him, but was not sent by Skynet!